Though the Greek-born composer Vangelis has produced some formidable work from the sinister score for Blade Runner (1982) to the huge, neoprimitive symphonic-choral piece The Mask (1985) his latest effort, The City, is closer in weight to the theme from Chariots of Fire (1982), the hokey hit that made him famous. Divided into eight contiguous sections ''Dawn,'' ''Side Streets,'' etc. The City is apparently intended as a sort of sonic stroll through a typical day in Rome, filled with ear-catching synthesizer effects and ambient city sounds (revving motorcycles, snatches of conversation). But, for all the cutting-edge electronics, Vangelis' tunes are mainly badly dated Eurojunk: generic Mediterranean-style folk ditties over ultra-square pop rhythms; a concertina lick straight out of an Italian travelogue; even a '60s-style cool-jazz number for breathy flute, brushed cymbals, and vibes (like, no bongos?). The City is structured a little like Gershwin's symphonic look at urban life, An American in Paris. But its content has more in common with Gidget Goes to Rome. C

